Pile foundations located within consolidating ground are commonly subjected to negative skin friction (NSF) and failures of pile foundations related to dragload (compressive force) and downdrag (pile settlement) have been reported in literature. In addition, they are normally subjected to axial load and NSF simultaneously. A field study was carried out to investigate load transfer behavior of piles in end-bearing and floating 2-pile groups in consolidating ground. Moreover, load transfer mechanisms of piles subjected to NSF was investigated in detail by centrifuge tests and axis-symmetric and three-dimensional numerical analyses to achieve three objectives: to investigate response of a single pile subjected to NSF with different pile tip locations with respect to end-bearing stratum, to study behavior of floating piles subjected to NSF with and without shielding by sacrificing piles, and, to study effects of axial load on load transfer mechanism along a single floating pile and shielded center pile within a group of sacrificing piles experiencing locked-in NSF. Based on field monitoring, downdrag developed on floating piles is 70% more than that on end-bearing piles and neutral plane (NP) is located deeper with stiffer end-bearing layer. Measured maximum β values ranged from 0.2 to 0.3 for piles located inside the end-bearing and floating pile groups. Based on centrifuge tests results, the maximum dragload developed at a single end-bearing pile is 60% more than that at a single floating pile, whereas downdrag developed on single floating pile is 200% greater than that on a single end-bearing pile. Both centrifuge and field monitoring results show larger downdrag obtained for floating pile than that of end-bearing pile. From centrifuge modeling results, the measured maximum β value at a single end-bearing and floating pile was similar and slightly smaller than 0.3. On the other hand, smaller β values of 0.1 and 0.2 were mobilized at the shielded center piles for pile spacings of 2.5D and 3.0D, respectively, where ...